A pit bull that was being walked without a muzzle attacked a shar-pei on Rua Diana in the Perdizes district of São Paulo on 5 July. Security-camera footage shows the dog’s handler losing control as the pit bull seized Aysha, the resting shar-pei, inflicting injuries to her head and neck. Bystanders eventually freed the smaller dog by dousing the pit bull with water and lifting its hind legs. Aysha’s owner said the pit bull’s handler is paying veterinary costs and that the injured dog is recovering after receiving medication. The incident has rekindled debate over enforcement of São Paulo state Law 11.531/2003, which obliges owners of pit bulls, rottweilers and mastim napolitanos to use a short leash, choke collar and muzzle in public. Breaching the rule carries a fine of 10 Unidade Fiscal do Estado de São Paulo (UFESP) and possible seizure of the animal, yet residents say compliance is spotty and policing is limited. Public concern over dangerous dogs is not confined to Brazil. In the United States, Florida’s recently approved Pam Rock Act—signed on 21 May—mandates that owners of dogs declared dangerous obtain at least US$100,000 in liability insurance and faces stiffer penalties if their animals attack people or other pets. Lawmakers there cited a series of fatal maulings as the impetus for the measures.